function studentClassTest(){
    var input =new Student('Tom',21,2);
    var expectResult = 'My name is Tom. I am 21 years old. I am a Student. I am at Class 2.';
    var actualResult = input.introduce();
    (actualResult == actualResult) ? console.log('studentClassTest Passed!') : console.log('studentClassTest Failed!')
}

studentClassTest();
